Challenge Quizzes

Completing the Square: Level 3 Challenges

When buying Brilliant T-shirts, Bradan determines that the total cost of buying NNN shirts is given by the function C(N)=0.04N2−36N+9000 C(N) = 0.04 N^2 - 36 N + 9000 C(N)=0.04N2−36N+9000 If he wants to minimize the total cost of buying shirts, how many shirts should he buy?